It means that you should reply only if you cannotattend.
If you do not reply then the host or hostess assumes you will be attending.
"Lo siento"
"RSVP regrets only" means the person who sends the invitation assumes your attendance UNLESS you reply with your "regrets" that you can not attend. In other words, you don't have to reply if you are planning to go but you should reply and let the host know if you are not.
I would think not, because an open house is for people to come and go as they please. Or not come or go, if they so wish.
Regrets Only was created on 2011-02-23.
If it says 'Regrets Only' then you only RSVP if you can't go. So if you can go you are not required to tell the host anything.
You can email your regrets only if you were invited to the baby shower via an email invitation. Likewise, if you were invited via an invitation card through the mail, then you should respond by mailing a card back. The exception to this rule is if the invitation specifies another way to rsvp (by providing a phone number or email address, for example).
The cast of Regrets Only - 2009 includes: Blair Fukumura
When one receives an invitation that says 'by invitation only' this means that only those on the invitation list will be admitted to the event. One can't bring a guest along.
Invitation Only was created on 2003-05-20.
Full of regret; indulging in regrets; repining.
It is a party that you need to receive an invitation to get in.
The meaning of an invitation poem is to invite someone to an event or gathering in a creative and engaging way, using poetic language to convey the message.